• Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • PRODUCTS
  • CONTRACTORS
  • ENGINEERS
  • RADIANT & HYDRONICS
  • INSIGHTS
  • MEDIA
  • RESOURCES
  • EMAGAZINE
  • SIGN UP!
cart
facebook instagram twitter linkedin youtube
  • CONTRACTORS
  • BATH & KITCHEN PRO
  • BUSINESS MANAGEMENT
  • HIGH EFFICIENCY HOMES
  • TECHNOLOGY
  • WATER TREATMENT
  • PMC COLUMNS
  • PMC COLUMNS
  • Dave Yates: Contractor’s Corner
  • John Siegenthaler: Hydronics Workshop
  • Kenny Chapman: The Blue Collar Coach
  • Matt Michel: Service Plumbing Pros
  • Scott Secor: Heating Perceptions
  • ENGINEERS
  • CONTINUING EDUCATION
  • DECARBONIZATION | ELECTRIFICATION
  • FIRE PROTECTION
  • GEOTHERMAL | SOLAR THERMAL
  • PIPING | PLUMBING | PVF
  • PME COLUMNS
  • PME COLUMNS
  • Christoph Lohr: Strategic Plumbing Insights
  • David Dexter: Plumbing Talking Points
  • James Dipping: Engineer Viewpoints
  • John Seigenthaler: Renewable Heating Design
  • Lowell Manalo: Plumbing Essentials
  • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
  • RADIANT COMFORT REPORT
  • THE GLITCH & THE FIX
  • INSIGHTS
  • CODES
  • GREEN PLUMBING & MECHANICAL
  • PROJECT PROFILES
  • COLUMNS
  • SPONSOR INSIGHTS
  • COLUMNS
  • Codes Corner
  • Natalie Forster: Editorial Opinion
  • Guest Editorial
  • MEDIA
  • PODCASTS
  • VIDEOS
  • WEBINARS
  • RESOURCES
  • INDUSTRY CALENDAR
  • DIRECTORIES
  • EBOOKS
  • PM BOOKSTORE
  • CE CENTER
  • MARKET RESEARCH
  • CLASSIFIEDS
  • EMAGAZINE
  • EMAGAZINE
  • ARCHIVE ISSUES
  • CONTACT
  • ADVERTISE
  • PME EMAGAZINE ARCHIVES
search
cart
facebook instagram twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • PRODUCTS
  • CONTRACTORS
    • BATH & KITCHEN PRO
    • BUSINESS MANAGEMENT
    • HIGH EFFICIENCY HOMES
    • TECHNOLOGY
    • WATER TREATMENT
    • PMC COLUMNS
      • Dave Yates: Contractor’s Corner
      • John Siegenthaler: Hydronics Workshop
      • Kenny Chapman: The Blue Collar Coach
      • Matt Michel: Service Plumbing Pros
      • Scott Secor: Heating Perceptions
  • ENGINEERS
    • CONTINUING EDUCATION
    • DECARBONIZATION | ELECTRIFICATION
    • FIRE PROTECTION
    • GEOTHERMAL | SOLAR THERMAL
    • PIPING | PLUMBING | PVF
    • PME COLUMNS
      • Christoph Lohr: Strategic Plumbing Insights
      • David Dexter: Plumbing Talking Points
      • James Dipping: Engineer Viewpoints
      • John Seigenthaler: Renewable Heating Design
      • Lowell Manalo: Plumbing Essentials
      • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
    • RADIANT COMFORT REPORT
    • THE GLITCH & THE FIX
  • INSIGHTS
    • CODES
    • GREEN PLUMBING & MECHANICAL
    • PROJECT PROFILES
    • COLUMNS
      • Codes Corner
      • Natalie Forster: Editorial Opinion
      • Guest Editorial
    • SPONSOR INSIGHTS
  • MEDIA
    • PODCASTS
    • VIDEOS
    • WEBINARS
  • RESOURCES
    • INDUSTRY CALENDAR
    • DIRECTORIES
    • EBOOKS
    • PM BOOKSTORE
    • CE CENTER
    • MARKET RESEARCH
    • CLASSIFIEDS
  • EMAGAZINE
    • EMAGAZINE
    • ARCHIVE ISSUES
    • CONTACT
    • ADVERTISE
    • PME EMAGAZINE ARCHIVES
  • SIGN UP!
Columns

Becoming Better At Soldering

By Julius Ballanco P.E., CPD
June 1, 2000
Plumbing contractors are becoming very familiar with the new standard, NSF 61. This standard has been cursed and praised by the industry. It came to light over the strict regulation for faucets. Plumbers, especially in California, watched as manufacturers fought, struggled, and gave in to NSF 61. The new federal regulations require all faucets supplying drinking water to conform to this standard.

You have also realized that this standard applies to pipe and fittings. Copper ran into problems with low pH water, as I had previously reported. Brass fittings for PEX also ran into problems.

Quite frankly, NSF 61 is a tough standard. The standard is applicable to any plumbing product that comes in direct contact with potable water. Many plumbing inspectors and health authorities are now enforcing NSF 61. Everything you use, coming in contact with drinking water, must be listed to NSF 61.

One of the products I never thought I would hear much about was flux for copper-soldered joints. The manufacturers didn’t have a difficult time complying with the standard for the flux. Name a major player in the flux business for plumbing systems, and they have a new flux that conforms to NSF 61. Many of the products have new names that indicate the safety aspect of the flux for potable water systems.

However, in parts of the country enforcing NSF 61, I started to receive a rash of phone calls. Large contractors, small contractors, and one-man shops called and asked for the inside scoop of what flux works. For some reason, they thought I knew the ins and outs and had the one brand name up my sleeve of the flux that they should use.

To tell you the truth, I was puzzled. I hadn’t seen any problems with the new NSF 61 fluxes. They worked fine for me. So I started asking what brands the plumbers were using. When they started listing brands that I knew (and liked), I surmised that something was up.

This prompted further inquires with the complaints I was receiving. “What is wrong with the flux? Why do you call the new fluxes junk?” The answer was always the same, “The solder doesn’t flow, you can’t make a decent joint.”

Serious Problem: That is when I realized that we have a serious problem on our hands. The problem, however, is not with the flux, nor with the copper industry, nor with the solder. The problem is us.

We have gotten lazy in the way we make soldered joints. The industry has given us such good products, that it was easy to become lazy. I have never encountered the problems that the plumbers are complaining about because I never forgot how my father trained me to solder.

When you learn from a master, you continue to follow his words of wisdom as a way of paying tribute. That is why I still solder the same way I learned more than 30 years ago. If you have used the new fluxes and have had no problems, like me, you are also probably following the ways of the master who trained you.

If you are having problems with the new fluxes, or are afraid to switch to the new fluxes — read on. (The rest of you, keep up the good work.)

The masters always trained us to use the heat of our torch intelligently. The location of the flame, the direction we aim it, and the gradual rise in temperature were all important points that the masters showed us. We would heat the joints and when they appeared to be up to temperature, we would test the joint with a little solder to see if we had achieved the temperature to flow the solder. When the temperature was achieved, we would flow the solder without applying too much additional heat.

I took pride when I mastered the art of soldering a copper piping system. My father took pride in training all of his sons to solder correctly. (God help you if you ever got caught doing it wrong.)

When we switched from lead-based solders to replacement solders, the temperature required to make a proper solder joint increased by about 100 degrees F. It didn’t take us long to realize that the replacement solders flowed like butter, much better than the lead-based solders. Many solder manufacturers declared that it is virtually impossible to make a bad joint with the replacement solders. This was all before the NSF 61 fluxes entered the market.

So, what is this laziness that we, as an industry, fell into? As one plumber said to me, “We just burn the crap out of the joint and then hit it with a little solder. Bingo, you have a perfect joint. This new solder is great!”

It’s that burning the crap out of the joint that is causing all of the problems. Many plumbers have switched to bigger tips on their torches to get more heat faster to the joint. The burning the crap out of the joint was an effort to reduce the time required to make a soldered joint.

Chemistry 101: Now for a review of chemistry. The component in the flux that makes the solder flow is what chemists refer to as a “salt.” The salt that dominated fluxes in the pre-NSF 61 days was zinc chloride. Zinc chloride is a wonderful component. It is highly forgiving, making it nearly impossible to have a bad joint.

The forgiveness of zinc chloride is that it allows you to raise the temperature of the joint to over 800 degrees F, more than double the heat required to make a proper soldered joint. The zinc chloride is so wonderful that you can raise and lower the temperature numerous times, and the flux would still allow the solder to flow. If you exceeded the high temperature limit, the flux would not flow.

The problem with zinc chloride is that it remains on the inside of the pipe for a long time. It doesn’t wash away when you flush a new system. After a period of time, the zinc chloride can contaminate the drinking water. There is even the possibility of creating a mild form of hydrochloric acid. Hence, it cannot pass NSF 61.

The replacements considered by manufacturers have been alternative salts, such as aluminum chloride and organic. These new salts do not have the temperature limits like zinc chloride. Their high temperature limits are around the 400 degrees F mark. High enough to make a soldered joint, but not high enough to burn the crap out of a joint. If you heat the flux above the high temperature limit, the flux turns black and ugly, and you cannot make the joint. The solder will not flow. You can attempt to brush more flux on the joint, but it still will not flow. Once you exceed the high temperature limit, you have no other choice than to start all over again.

How can you combat this problem of high temperature limit? You have to go back to following the proper procedures for making a soldered joint. The temperature must be raised gradually and the solder tested for flowing capabilities. The days of burning the crap out of a joint are over.

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Ballancojuliusvwhite 200

Julius Ballanco, P.E., CPD, F-ASPE, is president of J.B. Engineering and Code Consulting, P.C. in Munster, Ind. He can be reached at by email at jbengineer@aol.com.

Recommended Content

JOIN TODAY
to unlock your recommendations.

Already have an account? Sign In

  • Worker using the Milwaukee Tool SWITCH PACK drain cleaner

    Pipeline profits: Drain cleaning, pipe inspection create opportunities

    Drain cleaning and inspection services offer lucrative...
    Green Plumbing and Mechanical
    By: Nicole Krawcke
  • Uponor employee, Arturo Moreno

    The reinvestment in American manufacturing and training

    Plumbing & Mechanical Chief Editor Nicole Krawcke and...
    Plumbing News
    By: Nicole Krawcke and Natalie Forster
  • March 2024 Women in Plumbing hero image of woman engineer overlayed by circle of hexagon shapes with numbers from 1 to 10

    Celebrating 10 Influential Women in the Plumbing Industry

    Celebrating Women's History Month and Women in...
    Plumbing News
    By: Nicole Krawcke
close

1 COMPLIMENTARY ARTICLE(S) LEFT

Loader

Already a Registered User? Sign in now.

Subscribe For Free!
  • eNewsletters
  • Online Registration
  • Subscription Customer Service
  • eMagazine
  • Manage My Preferences

IPEX celebrates grand opening of new Florida distribution center

IPEX celebrates grand opening of new Florida distribution center

AI can boost efficiency and profitability for plumbing, HVAC contractors

AI can boost efficiency and profitability for plumbing, HVAC contractors

Bell & Gossett Illustrates Path to Net-zero at AHR Expo

Bell & Gossett Illustrates Path to Net-zero at AHR Expo

NIBCO Press Solutions

NIBCO Press Solutions

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to the Plumbing & Mechanical audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of Plumbing & Mechanical or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • J.J. Keller CMV vehicles on road
    Sponsored byJ. J. Keller & Associates, Inc.

    The dash cam game-changer for small business safety

Popular Stories

The interior of a government building.

President Trump signs executive order promoting skilled trades and apprenticeships

Figure 1 is a sketch of the flow problems of the current plumbing system.

Hydronic heating glitch solved: Why adding a circulator won't fix primary loop flow issue

Underfloor heating installation with drain sewer hole in bathroom close up on water floor heating.

Using hydronics to leverage time-of-use electrical rates

PM BEMIS June 25 Free Webinar: Optimizing Plumbing Solutions for Single-Family, Multi-Family & Public Spaces

Events

November 13, 2024

Future Proofing MEP: Navigating the 2026 High Efficiency Water Heating Standards

Join our deep dive into DOE’s new standards so you can future-proof your MEP practice.

EARN: 0.1 ASPE CEU; 1 AIA LU/HSW; 0.1 IACET CEU*; 1 PDH

View All Submit An Event

Poll

Will business be up or down in 2025?

Do you anticipate business in 2025 to be up or down in comparison to 2024?
View Results Poll Archive

Products

The Water Came To A Stop

The Water Came To A Stop

See More Products

Download the FREE Water Conservation, Quality & Safety eBook: Plumbing Trends Increasing Safe Water Availability

Related Articles

  • Ballanco

    Soldering vs. brazing when piping is involved

    See More
  • Plumbing Design Of Residential Sprinklers

    See More
  • It's The Solids That Run Away
    Julius Ballanco

    See More
×

Keep your content unclogged with our newsletters!

Stay in the know on the latest plumbing & piping industry trends.

JOIN TODAY!
  • RESOURCES
    • Advertise
    • Contact Us
    • Directories
    • Store
    • Want More
    • Supply House Times
  • SIGN UP TODAY
    • Create Account
    • eMagazine
    • eNewsletter
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • Instagram
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2025. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing

search
cart
facebook instagram twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • PRODUCTS
  • CONTRACTORS
    • BATH & KITCHEN PRO
    • BUSINESS MANAGEMENT
    • HIGH EFFICIENCY HOMES
    • TECHNOLOGY
    • WATER TREATMENT
    • PMC COLUMNS
      • Dave Yates: Contractor’s Corner
      • John Siegenthaler: Hydronics Workshop
      • Kenny Chapman: The Blue Collar Coach
      • Matt Michel: Service Plumbing Pros
      • Scott Secor: Heating Perceptions
  • ENGINEERS
    • CONTINUING EDUCATION
    • DECARBONIZATION | ELECTRIFICATION
    • FIRE PROTECTION
    • GEOTHERMAL | SOLAR THERMAL
    • PIPING | PLUMBING | PVF
    • PME COLUMNS
      • Christoph Lohr: Strategic Plumbing Insights
      • David Dexter: Plumbing Talking Points
      • James Dipping: Engineer Viewpoints
      • John Seigenthaler: Renewable Heating Design
      • Lowell Manalo: Plumbing Essentials
      • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
    • RADIANT COMFORT REPORT
    • THE GLITCH & THE FIX
  • INSIGHTS
    • CODES
    • GREEN PLUMBING & MECHANICAL
    • PROJECT PROFILES
    • COLUMNS
      • Codes Corner
      • Natalie Forster: Editorial Opinion
      • Guest Editorial
    • SPONSOR INSIGHTS
  • MEDIA
    • PODCASTS
    • VIDEOS
    • WEBINARS
  • RESOURCES
    • INDUSTRY CALENDAR
    • DIRECTORIES
    • EBOOKS
    • PM BOOKSTORE
    • CE CENTER
    • MARKET RESEARCH
    • CLASSIFIEDS
  • EMAGAZINE
    • EMAGAZINE
    • ARCHIVE ISSUES
    • CONTACT
    • ADVERTISE
    • PME EMAGAZINE ARCHIVES
  • SIGN UP!